Reduced leaching of arsenic and/or mercury from solid wastes
US5360632A · kind A · utility
33Cited by
11References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Aug 10, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62D2203/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Solid waste material which contains arsenic and/or mercury impurities is encapsulated in a cured polysulfide polymer so as to alleviate leaching of arsenic and/or mercury into aqueous liquids. Preferably, the solid waste material is first extracted with an alcohol such as ethanol or, alternatively, treated with an oxidizing agent such as aqueous hydrogen peroxide and then substantially dried before the encapsulation with the polymer is carried out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.